boards: arm: xmc47_relax_kit: Convert to v2

Converts the board to hwmv2

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>

boards/infineon/xmc47_relax_kit/Kconfig.defconfig

@@ -4,9 +4,6 @@
 
 if BOARD_XMC47_RELAX_KIT
 
-config BOARD
-	default "xmc47_relax_kit"
-
 if NETWORKING
 
 config NET_L2_ETHERNET

boards/infineon/xmc47_relax_kit/Kconfig.xmc47_relax_kit

@@ -3,6 +3,5 @@
 # Copyright (c) 2023 Schlumberger
 
 config BOARD_XMC47_RELAX_KIT
-	bool "Infineon XMC4700 Relax Kit"
-	depends on SOC_SERIES_XMC_4XXX
+	select SOC_XMC4700
 	select SOC_PART_NUMBER_F144X2048

boards/infineon/xmc47_relax_kit/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: xmc47_relax_kit
+  vendor: Infineon
+  socs:
+  - name: xmc4700

boards/infineon/xmc47_relax_kit/xmc47_relax_kit_defconfig

@@ -2,14 +2,10 @@
 #
 # Copyright (c) 2023 Schlumberger
 
-CONFIG_BOARD_XMC47_RELAX_KIT=y
-CONFIG_SOC_SERIES_XMC_4XXX=y
-CONFIG_SOC_XMC4700=y
-
-# enable uart driver
+# Enable UART driver
 CONFIG_SERIAL=y
 
-# enable console
+# Enable console
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
 CONFIG_USE_DT_CODE_PARTITION=y